(n) moving your hand in a jellyfish movement on a man's package while trying to give him a handjob. something most little eighth grade girls do to their older boyfriends, for lack of knowledge how to give a real one.

It's when after someone takes a shower, they stop the drain and leave a little water left in the tub. Then they ejaculate in the small pool and leave the "jellyfish" there for the next person/roommate to discover.

you live in an apartment, dorm, or house - where a bathroom is shared. the Jellyfish is at the next level of disgusting pranks!

N., a statement that sounds like a compliment but, the more you think about it, the more it stings like an insult. So named because, like a jellyfish, you don't feel it at first, but the longer you leave it on, the more it stings.

Chick #1: She was like, "You actually look nice today," and I was like, "Thanks." But then I'm like, what the fuck was the purpose of "actually"? Was she saying I don't usually look nice?
Chick #2: She said a total jellyfish to you, bitch.